Search found 3 matches
ds number property
How would you approach this question in the most time efficient manner?
If x and y are positive integers such that x = 8y + 12, what is the greatest common divisor of x and y?
(1) x = 12u, where u is an integer
(2) y = 12z, where z is an integer
- by [email protected]
Wed Aug 21, 2013 1:42 am- Forum: Data Sufficiency
- Topic: ds number property
- Replies: 2
- Views: 1337
- by [email protected]
Tue Jul 23, 2013 11:06 am- Forum: Problem Solving
- Topic: combinatorics problem
- Replies: 15
- Views: 9844
combinatorics problem
Can someone give me tips on how to crack this question. The Carson family will purchase three used cars. There are two models of cars available, Model A and Model B, each of which is available in four colors: blue, black, red, and green. How many different combinations of three cars can the Carsons ...
- by [email protected]
Mon Jul 22, 2013 1:50 pm- Forum: Problem Solving
- Topic: combinatorics problem
- Replies: 15
- Views: 9844